A051829 - OEIS

%I #5 Jun 11 2014 17:24:23

%S 1,5,30,210,1850,19528,233289,2805652,31522803,326897695,3190607915,

%T 30250443755,287335303424,2785929699350,27611310448037,276727430606458

%N Number of numbers below 10^n with nonzero multiplicative digital root 9.

%D William Mayne, sci.math, Jun 15 1991

%F # { i : 10^(n-1) < i < 10^n and A051802(i)=9 }

%Y Cf. A051802, A051811, A051820.

%K nonn,base,hard

%O 1,2

%A _Dan Hoey_, Dec 09 1999